Multiple process support (which includes your multiple application use case) was added in Codec Engine 2.00. Prior to that release, you're limited to a single process (multiple threads within that process is supported).
Also, when using multiple processes, if you're running remote algorithms on another processor (e.g. DM644x, DM6467), you must use LAD: http://wiki.davincidsp.com/index.php?title=Link_Arbiter_Daemon Given all that, on to your questions: 1. Yes, you can - and must(!) - call CERuntime_init() from both processes. 2. Your use case should work; please confirm which version of CE you're using (must be > 2.00 as described above) if you want us to report further details about the assert you're seeing. Chris ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of minhong Sent: Thursday, July 31, 2008 2:27 AM To: davinci-linux-open-source Subject: Questions about codec engine Hi, all, I've several questions that need your help. 1. If I have two applications said A1(used to encode MPEG4) and A2(used to decode JPEG), I think I'll have CERuntime_init() called in each application. When I execute A2 after A1 is executed and still running, the two applications seem to terminate together. So, what's wrong for this situation ? May I call CERuntime_init() while the other process has called it ? 2. As mentioned in 1. what is the correct way if I want to show JPEG repeatedly while MPEG4 is being encoded. ? I used two threads for different jobs (one for MPEG4 encoding, said video_thread and one for JPEG decoding, said image_thread). When the video_thread is running, I'll do some command to invoke the jpeg_thread for decoding a picture. Eventually, I'll got the message: ERROR: assertion violation: Sem_posix.c, line308 and the application is halt. I'm wondering if I can call any IMGDEC_control/IMGDEC_process API if VIDENC_process is repeatedly called in the video_thread. minhong.
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